Contact our Investment Managers

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Our staff are based across the south of the UK. To find out more about us first click an office.


Michael Lally profile picture

Michael Lally Chartered FCSI

Director, Investment Manager

T: 01243 753409


Michael has considerable investment experience, having joined Thesis in 1978 following a career in stockbroking and private banking. He heads the Asset Allocation, Research and Dealing teams and has a special focus on fixed interest markets where he is lead manager of the Optima Bond Fund. He also runs the Chichester office private client team where he specialises in the management of portfolios for charities. Investment experience since 1968

Ian Creswick

Ian Creswick MA (Oxon), ACIB, Chartered MCSI

Investment Manager

T: 01243 753413


Ian trained and spent many years at Lloyds Private Banking and then at another solicitor investment manager before joining Thesis in 1997. He has wide experience of private client work including trusts and Charities. Ian currently sits on the Fixed Interest committee, having also previously also been on the UK equity and Fund Selection committees.
Investment experience since 1984

James Nield MA (Cantab), ASIP, Chartered FCSI

Investment Manager

T: 01243 521784


James began his career at Cazenove Fund Management, where he spent five years as assistant manager of a Global Emerging Markets Fund. He spent the next 11 years specialising in UK equities at Oriel Securities, where he was a partner, and at Royal Bank of Canada.

Investment Experience since 1997.


David Tyerman profile picture

David Tyerman BSc (Hons), MBA (Fin)

Managing Director

T: 01243 753415


David has a degree in Biochemistry from Cardiff University and a post-graduate qualification from City University Business School. He began his City career at Société Generale before taking up a role managing the portfolios of ultra-high net worth investors. David specialises in advising high net worth families, estates and institutions heading the Private Office services of Thesis. 

Samantha Butlin profile picture

Samantha Butlin ACSI

Investment Manager

T: 01243 753420


Sam began her career heading up the PEP and ISA products at Thesis before moving into her current role. She has a broad role in advising on and administering investments held for many clients and particular expertise in the Private Office service for high net worth clients.